/**
 * Licensed to Jasig under one or more contributor license
 * agreements. See the NOTICE file distributed with this work
 * for additional information regarding copyright ownership.
 * Jasig licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a
 * copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.jasig.portal.utils.jsp;

import java.util.Collection;
import java.util.Map;

/**
 * JSP Static utility functions
 * 
 * @author Eric Dalquist
 * @version $Revision$
 */
public class Util {
    
    public static boolean contains(Collection<?> coll, Object o) {
        return coll != null && coll.contains(o);
    }

    public static boolean containsKey(Map<?, ?> map, Object o) {
        return map != null && map.containsKey(o);
    }

    public static boolean containsValue(Map<?, ?> map, Object o) {
        return map != null && map.containsValue(o);
    }
    
    public static boolean instanceOf(Object obj, String className) throws ClassNotFoundException {
        final ClassLoader cl = obj.getClass().getClassLoader();
        final Class<?> clazz = Class.forName(className, true, cl);
        final boolean isInstanceOf = obj.getClass().isAssignableFrom(clazz);
        return isInstanceOf;
    }

}
